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21#include <linux/init.h>
22#include <linux/slab.h>
23#include <linux/pci.h>
24#include <linux/compat.h>
25#include <linux/mutex.h>
26#include <linux/ctype.h>
27#include <linux/string.h>
28#include <linux/export.h>
29#include <sound/core.h>
30#include "hda_codec.h"
31#include "hda_local.h"
32#include <sound/hda_hwdep.h>
33#include <sound/minors.h>
34
35
36struct hda_hint {
37 const char *key;
38 const char *val;
39};
40
41
42
43
44static int verb_write_ioctl(struct hda_codec *codec,
45 struct hda_verb_ioctl __user *arg)
46{
47 u32 verb, res;
48
49 if (get_user(verb, &arg->verb))
50 return -EFAULT;
51 res = snd_hda_codec_read(codec, verb >> 24, 0,
52 (verb >> 8) & 0xffff, verb & 0xff);
53 if (put_user(res, &arg->res))
54 return -EFAULT;
55 return 0;
56}
57
58static int get_wcap_ioctl(struct hda_codec *codec,
59 struct hda_verb_ioctl __user *arg)
60{
61 u32 verb, res;
62
63 if (get_user(verb, &arg->verb))
64 return -EFAULT;
65 res = get_wcaps(codec, verb >> 24);
66 if (put_user(res, &arg->res))
67 return -EFAULT;
68 return 0;
69}
70
71
72
73
74static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
75 unsigned int cmd, unsigned long arg)
76{
77 struct hda_codec *codec = hw->private_data;
78 void __user *argp = (void __user *)arg;
79
80 switch (cmd) {
81 case HDA_IOCTL_PVERSION:
82 return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
83 case HDA_IOCTL_VERB_WRITE:
84 return verb_write_ioctl(codec, argp);
85 case HDA_IOCTL_GET_WCAP:
86 return get_wcap_ioctl(codec, argp);
87 }
88 return -ENOIOCTLCMD;
89}
90
91#ifdef CONFIG_COMPAT
92static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
93 unsigned int cmd, unsigned long arg)
94{
95 return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
96}
97#endif
98
99static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
100{
101#ifndef CONFIG_SND_DEBUG_VERBOSE
102 if (!capable(CAP_SYS_RAWIO))
103 return -EACCES;
104#endif
105 return 0;
106}
107
108static void clear_hwdep_elements(struct hda_codec *codec)
109{
110 int i;
111
112
113 snd_array_free(&codec->init_verbs);
114
115 for (i = 0; i < codec->hints.used; i++) {
116 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
117 kfree(hint->key);
118 }
119 snd_array_free(&codec->hints);
120 snd_array_free(&codec->user_pins);
121}
122
123static void hwdep_free(struct snd_hwdep *hwdep)
124{
125 clear_hwdep_elements(hwdep->private_data);
126}
127
128int snd_hda_create_hwdep(struct hda_codec *codec)
129{
130 char hwname[16];
131 struct snd_hwdep *hwdep;
132 int err;
133
134 sprintf(hwname, "HDA Codec %d", codec->addr);
135 err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
136 if (err < 0)
137 return err;
138 codec->hwdep = hwdep;
139 sprintf(hwdep->name, "HDA Codec %d", codec->addr);
140 hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
141 hwdep->private_data = codec;
142 hwdep->private_free = hwdep_free;
143 hwdep->exclusive = 1;
144
145 hwdep->ops.open = hda_hwdep_open;
146 hwdep->ops.ioctl = hda_hwdep_ioctl;
147#ifdef CONFIG_COMPAT
148 hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
149#endif
150
151 mutex_init(&codec->user_mutex);
152 snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
153 snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
154 snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
155
156 return 0;
157}
158
159#ifdef CONFIG_PM
160static ssize_t power_on_acct_show(struct device *dev,
161 struct device_attribute *attr,
162 char *buf)
163{
164 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
165 struct hda_codec *codec = hwdep->private_data;
166 snd_hda_update_power_acct(codec);
167 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
168}
169
170static ssize_t power_off_acct_show(struct device *dev,
171 struct device_attribute *attr,
172 char *buf)
173{
174 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
175 struct hda_codec *codec = hwdep->private_data;
176 snd_hda_update_power_acct(codec);
177 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
178}
179
180static struct device_attribute power_attrs[] = {
181 __ATTR_RO(power_on_acct),
182 __ATTR_RO(power_off_acct),
183};
184
185int snd_hda_hwdep_add_power_sysfs(struct hda_codec *codec)
186{
187 struct snd_hwdep *hwdep = codec->hwdep;
188 int i;
189
190 for (i = 0; i < ARRAY_SIZE(power_attrs); i++)
191 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
192 hwdep->device, &power_attrs[i]);
193 return 0;
194}
195#endif
196
197#ifdef CONFIG_SND_HDA_RECONFIG
198
199
200
201
202
203static int clear_codec(struct hda_codec *codec)
204{
205 int err;
206
207 err = snd_hda_codec_reset(codec);
208 if (err < 0) {
209 snd_printk(KERN_ERR "The codec is being used, can't free.\n");
210 return err;
211 }
212 clear_hwdep_elements(codec);
213 return 0;
214}
215
216static int reconfig_codec(struct hda_codec *codec)
217{
218 int err;
219
220 snd_hda_power_up(codec);
221 snd_printk(KERN_INFO "hda-codec: reconfiguring\n");
222 err = snd_hda_codec_reset(codec);
223 if (err < 0) {
224 snd_printk(KERN_ERR
225 "The codec is being used, can't reconfigure.\n");
226 goto error;
227 }
228 err = snd_hda_codec_configure(codec);
229 if (err < 0)
230 goto error;
231
232 err = snd_hda_codec_build_pcms(codec);
233 if (err < 0)
234 goto error;
235
236 err = snd_hda_codec_build_controls(codec);
237 if (err < 0)
238 goto error;
239 err = snd_card_register(codec->bus->card);
240 error:
241 snd_hda_power_down(codec);
242 return err;
243}
244
245
246
247
248static char *kstrndup_noeol(const char *src, size_t len)
249{
250 char *s = kstrndup(src, len, GFP_KERNEL);
251 char *p;
252 if (!s)
253 return NULL;
254 p = strchr(s, '\n');
255 if (p)
256 *p = 0;
257 return s;
258}
259
260#define CODEC_INFO_SHOW(type) \
261static ssize_t type##_show(struct device *dev, \
262 struct device_attribute *attr, \
263 char *buf) \
264{ \
265 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
266 struct hda_codec *codec = hwdep->private_data; \
267 return sprintf(buf, "0x%x\n", codec->type); \
268}
269
270#define CODEC_INFO_STR_SHOW(type) \
271static ssize_t type##_show(struct device *dev, \
272 struct device_attribute *attr, \
273 char *buf) \
274{ \
275 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
276 struct hda_codec *codec = hwdep->private_data; \
277 return sprintf(buf, "%s\n", \
278 codec->type ? codec->type : ""); \
279}
280
281CODEC_INFO_SHOW(vendor_id);
282CODEC_INFO_SHOW(subsystem_id);
283CODEC_INFO_SHOW(revision_id);
284CODEC_INFO_SHOW(afg);
285CODEC_INFO_SHOW(mfg);
286CODEC_INFO_STR_SHOW(vendor_name);
287CODEC_INFO_STR_SHOW(chip_name);
288CODEC_INFO_STR_SHOW(modelname);
289
290#define CODEC_INFO_STORE(type) \
291static ssize_t type##_store(struct device *dev, \
292 struct device_attribute *attr, \
293 const char *buf, size_t count) \
294{ \
295 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
296 struct hda_codec *codec = hwdep->private_data; \
297 unsigned long val; \
298 int err = strict_strtoul(buf, 0, &val); \
299 if (err < 0) \
300 return err; \
301 codec->type = val; \
302 return count; \
303}
304
305#define CODEC_INFO_STR_STORE(type) \
306static ssize_t type##_store(struct device *dev, \
307 struct device_attribute *attr, \
308 const char *buf, size_t count) \
309{ \
310 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
311 struct hda_codec *codec = hwdep->private_data; \
312 char *s = kstrndup_noeol(buf, 64); \
313 if (!s) \
314 return -ENOMEM; \
315 kfree(codec->type); \
316 codec->type = s; \
317 return count; \
318}
319
320CODEC_INFO_STORE(vendor_id);
321CODEC_INFO_STORE(subsystem_id);
322CODEC_INFO_STORE(revision_id);
323CODEC_INFO_STR_STORE(vendor_name);
324CODEC_INFO_STR_STORE(chip_name);
325CODEC_INFO_STR_STORE(modelname);
326
327#define CODEC_ACTION_STORE(type) \
328static ssize_t type##_store(struct device *dev, \
329 struct device_attribute *attr, \
330 const char *buf, size_t count) \
331{ \
332 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
333 struct hda_codec *codec = hwdep->private_data; \
334 int err = 0; \
335 if (*buf) \
336 err = type##_codec(codec); \
337 return err < 0 ? err : count; \
338}
339
340CODEC_ACTION_STORE(reconfig);
341CODEC_ACTION_STORE(clear);
342
343static ssize_t init_verbs_show(struct device *dev,
344 struct device_attribute *attr,
345 char *buf)
346{
347 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
348 struct hda_codec *codec = hwdep->private_data;
349 int i, len = 0;
350 mutex_lock(&codec->user_mutex);
351 for (i = 0; i < codec->init_verbs.used; i++) {
352 struct hda_verb *v = snd_array_elem(&codec->init_verbs, i);
353 len += snprintf(buf + len, PAGE_SIZE - len,
354 "0x%02x 0x%03x 0x%04x\n",
355 v->nid, v->verb, v->param);
356 }
357 mutex_unlock(&codec->user_mutex);
358 return len;
359}
360
361static int parse_init_verbs(struct hda_codec *codec, const char *buf)
362{
363 struct hda_verb *v;
364 int nid, verb, param;
365
366 if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3)
367 return -EINVAL;
368 if (!nid || !verb)
369 return -EINVAL;
370 mutex_lock(&codec->user_mutex);
371 v = snd_array_new(&codec->init_verbs);
372 if (!v) {
373 mutex_unlock(&codec->user_mutex);
374 return -ENOMEM;
375 }
376 v->nid = nid;
377 v->verb = verb;
378 v->param = param;
379 mutex_unlock(&codec->user_mutex);
380 return 0;
381}
382
383static ssize_t init_verbs_store(struct device *dev,
384 struct device_attribute *attr,
385 const char *buf, size_t count)
386{
387 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
388 struct hda_codec *codec = hwdep->private_data;
389 int err = parse_init_verbs(codec, buf);
390 if (err < 0)
391 return err;
392 return count;
393}
394
395static ssize_t hints_show(struct device *dev,
396 struct device_attribute *attr,
397 char *buf)
398{
399 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
400 struct hda_codec *codec = hwdep->private_data;
401 int i, len = 0;
402 mutex_lock(&codec->user_mutex);
403 for (i = 0; i < codec->hints.used; i++) {
404 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
405 len += snprintf(buf + len, PAGE_SIZE - len,
406 "%s = %s\n", hint->key, hint->val);
407 }
408 mutex_unlock(&codec->user_mutex);
409 return len;
410}
411
412static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
413{
414 int i;
415
416 for (i = 0; i < codec->hints.used; i++) {
417 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
418 if (!strcmp(hint->key, key))
419 return hint;
420 }
421 return NULL;
422}
423
424static void remove_trail_spaces(char *str)
425{
426 char *p;
427 if (!*str)
428 return;
429 p = str + strlen(str) - 1;
430 for (; isspace(*p); p--) {
431 *p = 0;
432 if (p == str)
433 return;
434 }
435}
436
437#define MAX_HINTS 1024
438
439static int parse_hints(struct hda_codec *codec, const char *buf)
440{
441 char *key, *val;
442 struct hda_hint *hint;
443 int err = 0;
444
445 buf = skip_spaces(buf);
446 if (!*buf || *buf == '#' || *buf == '\n')
447 return 0;
448 if (*buf == '=')
449 return -EINVAL;
450 key = kstrndup_noeol(buf, 1024);
451 if (!key)
452 return -ENOMEM;
453
454 val = strchr(key, '=');
455 if (!val) {
456 kfree(key);
457 return -EINVAL;
458 }
459 *val++ = 0;
460 val = skip_spaces(val);
461 remove_trail_spaces(key);
462 remove_trail_spaces(val);
463 mutex_lock(&codec->user_mutex);
464 hint = get_hint(codec, key);
465 if (hint) {
466
467 kfree(hint->key);
468 hint->key = key;
469 hint->val = val;
470 goto unlock;
471 }
472
473 if (codec->hints.used >= MAX_HINTS)
474 hint = NULL;
475 else
476 hint = snd_array_new(&codec->hints);
477 if (hint) {
478 hint->key = key;
479 hint->val = val;
480 } else {
481 err = -ENOMEM;
482 }
483 unlock:
484 mutex_unlock(&codec->user_mutex);
485 if (err)
486 kfree(key);
487 return err;
488}
489
490static ssize_t hints_store(struct device *dev,
491 struct device_attribute *attr,
492 const char *buf, size_t count)
493{
494 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
495 struct hda_codec *codec = hwdep->private_data;
496 int err = parse_hints(codec, buf);
497 if (err < 0)
498 return err;
499 return count;
500}
501
502static ssize_t pin_configs_show(struct hda_codec *codec,
503 struct snd_array *list,
504 char *buf)
505{
506 int i, len = 0;
507 mutex_lock(&codec->user_mutex);
508 for (i = 0; i < list->used; i++) {
509 struct hda_pincfg *pin = snd_array_elem(list, i);
510 len += sprintf(buf + len, "0x%02x 0x%08x\n",
511 pin->nid, pin->cfg);
512 }
513 mutex_unlock(&codec->user_mutex);
514 return len;
515}
516
517static ssize_t init_pin_configs_show(struct device *dev,
518 struct device_attribute *attr,
519 char *buf)
520{
521 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
522 struct hda_codec *codec = hwdep->private_data;
523 return pin_configs_show(codec, &codec->init_pins, buf);
524}
525
526static ssize_t user_pin_configs_show(struct device *dev,
527 struct device_attribute *attr,
528 char *buf)
529{
530 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
531 struct hda_codec *codec = hwdep->private_data;
532 return pin_configs_show(codec, &codec->user_pins, buf);
533}
534
535static ssize_t driver_pin_configs_show(struct device *dev,
536 struct device_attribute *attr,
537 char *buf)
538{
539 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
540 struct hda_codec *codec = hwdep->private_data;
541 return pin_configs_show(codec, &codec->driver_pins, buf);
542}
543
544#define MAX_PIN_CONFIGS 32
545
546static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
547{
548 int nid, cfg, err;
549
550 if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
551 return -EINVAL;
552 if (!nid)
553 return -EINVAL;
554 mutex_lock(&codec->user_mutex);
555 err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
556 mutex_unlock(&codec->user_mutex);
557 return err;
558}
559
560static ssize_t user_pin_configs_store(struct device *dev,
561 struct device_attribute *attr,
562 const char *buf, size_t count)
563{
564 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
565 struct hda_codec *codec = hwdep->private_data;
566 int err = parse_user_pin_configs(codec, buf);
567 if (err < 0)
568 return err;
569 return count;
570}
571
572#define CODEC_ATTR_RW(type) \
573 __ATTR(type, 0644, type##_show, type##_store)
574#define CODEC_ATTR_RO(type) \
575 __ATTR_RO(type)
576#define CODEC_ATTR_WO(type) \
577 __ATTR(type, 0200, NULL, type##_store)
578
579static struct device_attribute codec_attrs[] = {
580 CODEC_ATTR_RW(vendor_id),
581 CODEC_ATTR_RW(subsystem_id),
582 CODEC_ATTR_RW(revision_id),
583 CODEC_ATTR_RO(afg),
584 CODEC_ATTR_RO(mfg),
585 CODEC_ATTR_RW(vendor_name),
586 CODEC_ATTR_RW(chip_name),
587 CODEC_ATTR_RW(modelname),
588 CODEC_ATTR_RW(init_verbs),
589 CODEC_ATTR_RW(hints),
590 CODEC_ATTR_RO(init_pin_configs),
591 CODEC_ATTR_RW(user_pin_configs),
592 CODEC_ATTR_RO(driver_pin_configs),
593 CODEC_ATTR_WO(reconfig),
594 CODEC_ATTR_WO(clear),
595};
596
597
598
599
600int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
601{
602 struct snd_hwdep *hwdep = codec->hwdep;
603 int i;
604
605 for (i = 0; i < ARRAY_SIZE(codec_attrs); i++)
606 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
607 hwdep->device, &codec_attrs[i]);
608 return 0;
609}
610
611
612
613
614const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
615{
616 struct hda_hint *hint = get_hint(codec, key);
617 return hint ? hint->val : NULL;
618}
619EXPORT_SYMBOL_HDA(snd_hda_get_hint);
620
621int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
622{
623 const char *p;
624 int ret;
625
626 mutex_lock(&codec->user_mutex);
627 p = snd_hda_get_hint(codec, key);
628 if (!p || !*p)
629 ret = -ENOENT;
630 else {
631 switch (toupper(*p)) {
632 case 'T':
633 case 'Y':
634 case '1':
635 ret = 1;
636 break;
637 default:
638 ret = 0;
639 break;
640 }
641 }
642 mutex_unlock(&codec->user_mutex);
643 return ret;
644}
645EXPORT_SYMBOL_HDA(snd_hda_get_bool_hint);
646
647int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp)
648{
649 const char *p;
650 unsigned long val;
651 int ret;
652
653 mutex_lock(&codec->user_mutex);
654 p = snd_hda_get_hint(codec, key);
655 if (!p)
656 ret = -ENOENT;
657 else if (strict_strtoul(p, 0, &val))
658 ret = -EINVAL;
659 else {
660 *valp = val;
661 ret = 0;
662 }
663 mutex_unlock(&codec->user_mutex);
664 return ret;
665}
666EXPORT_SYMBOL_HDA(snd_hda_get_int_hint);
667#endif
668
669#ifdef CONFIG_SND_HDA_PATCH_LOADER
670
671
672enum {
673 LINE_MODE_NONE,
674 LINE_MODE_CODEC,
675 LINE_MODE_MODEL,
676 LINE_MODE_PINCFG,
677 LINE_MODE_VERB,
678 LINE_MODE_HINT,
679 LINE_MODE_VENDOR_ID,
680 LINE_MODE_SUBSYSTEM_ID,
681 LINE_MODE_REVISION_ID,
682 LINE_MODE_CHIP_NAME,
683 NUM_LINE_MODES,
684};
685
686static inline int strmatch(const char *a, const char *b)
687{
688 return strnicmp(a, b, strlen(b)) == 0;
689}
690
691
692
693
694static void parse_codec_mode(char *buf, struct hda_bus *bus,
695 struct hda_codec **codecp)
696{
697 int vendorid, subid, caddr;
698 struct hda_codec *codec;
699
700 *codecp = NULL;
701 if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
702 list_for_each_entry(codec, &bus->codec_list, list) {
703 if ((vendorid <= 0 || codec->vendor_id == vendorid) &&
704 (subid <= 0 || codec->subsystem_id == subid) &&
705 codec->addr == caddr) {
706 *codecp = codec;
707 break;
708 }
709 }
710 }
711}
712
713
714
715
716
717static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
718 struct hda_codec **codecp)
719{
720 parse_user_pin_configs(*codecp, buf);
721}
722
723static void parse_verb_mode(char *buf, struct hda_bus *bus,
724 struct hda_codec **codecp)
725{
726 parse_init_verbs(*codecp, buf);
727}
728
729static void parse_hint_mode(char *buf, struct hda_bus *bus,
730 struct hda_codec **codecp)
731{
732 parse_hints(*codecp, buf);
733}
734
735static void parse_model_mode(char *buf, struct hda_bus *bus,
736 struct hda_codec **codecp)
737{
738 kfree((*codecp)->modelname);
739 (*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
740}
741
742static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
743 struct hda_codec **codecp)
744{
745 kfree((*codecp)->chip_name);
746 (*codecp)->chip_name = kstrdup(buf, GFP_KERNEL);
747}
748
749#define DEFINE_PARSE_ID_MODE(name) \
750static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
751 struct hda_codec **codecp) \
752{ \
753 unsigned long val; \
754 if (!strict_strtoul(buf, 0, &val)) \
755 (*codecp)->name = val; \
756}
757
758DEFINE_PARSE_ID_MODE(vendor_id);
759DEFINE_PARSE_ID_MODE(subsystem_id);
760DEFINE_PARSE_ID_MODE(revision_id);
761
762
763struct hda_patch_item {
764 const char *tag;
765 void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
766 int need_codec;
767};
768
769static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
770 [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 },
771 [LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 },
772 [LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 },
773 [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 },
774 [LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 },
775 [LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 },
776 [LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 },
777 [LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 },
778 [LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 },
779};
780
781
782static int parse_line_mode(char *buf, struct hda_bus *bus)
783{
784 int i;
785 for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
786 if (!patch_items[i].tag)
787 continue;
788 if (strmatch(buf, patch_items[i].tag))
789 return i;
790 }
791 return LINE_MODE_NONE;
792}
793
794
795
796
797
798
799
800static int get_line_from_fw(char *buf, int size, size_t *fw_size_p,
801 const void **fw_data_p)
802{
803 int len;
804 size_t fw_size = *fw_size_p;
805 const char *p = *fw_data_p;
806
807 while (isspace(*p) && fw_size) {
808 p++;
809 fw_size--;
810 }
811 if (!fw_size)
812 return 0;
813
814 for (len = 0; len < fw_size; len++) {
815 if (!*p)
816 break;
817 if (*p == '\n') {
818 p++;
819 len++;
820 break;
821 }
822 if (len < size)
823 *buf++ = *p++;
824 }
825 *buf = 0;
826 *fw_size_p = fw_size - len;
827 *fw_data_p = p;
828 remove_trail_spaces(buf);
829 return 1;
830}
831
832
833
834
835int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
836{
837 char buf[128];
838 struct hda_codec *codec;
839 int line_mode;
840
841 line_mode = LINE_MODE_NONE;
842 codec = NULL;
843 while (get_line_from_fw(buf, sizeof(buf) - 1, &fw_size, &fw_buf)) {
844 if (!*buf || *buf == '#' || *buf == '\n')
845 continue;
846 if (*buf == '[')
847 line_mode = parse_line_mode(buf, bus);
848 else if (patch_items[line_mode].parser &&
849 (codec || !patch_items[line_mode].need_codec))
850 patch_items[line_mode].parser(buf, bus, &codec);
851 }
852 return 0;
853}
854EXPORT_SYMBOL_HDA(snd_hda_load_patch);
855#endif
856
